udp无连接双向通信
#include
#include
#include
#include /* See NOTES */
#include
#include
#include
#include
#include
#include
typedef struct sockaddr sockaddr_t;
typedef struct sockaddr_in sockaddr_in_t;
typedef struct in6_addr in6_addr_t;
typedef unsigned int u32;
#define CUR printf("%s : %d\n", __FILE__, __LINE__);
#define SeverIP "192.168.1.104"
#define ClientIP "192.168.1.107"
#define THRAN_1024 1025
#define PORT THRAN_1024
static int sfd, ret, len = sizeof(sockaddr_t);
static sockaddr_in_t server_addr; // 服务器地址
static sockaddr_in_t client_addr; // 客户端地址
/* ctr +c 关闭描述符*/
static void sig_int(int sig)
{ close(sfd);
exit(0);
}
void *work_sendto(void *arg)
{
char buf[50];
while (1) {
memset(buf, 0, 50);
fgets(buf, 50, stdin); // 获取输入
sendto(sfd, buf, strlen(buf), 0, (sockaddr_t *)&client_addr, len);
}
pthread_exit(NULL);
}
void *work_recvfrom(void *arg)
{
char buf[50];
int ret;
while (1) {
memset(buf, 0, 50);
ret = recvfrom(sfd, buf, sizeof(buf), 0, (sockaddr_t *)&client_addr, &len); // 阻塞接口
printf("recvfrom %d: %s", ret, buf);
if (!ret) {
perror("client shutdown");
exit(0);
}
}
pthread_exit(NULL);
}
int main(int argc, char **argv)
{
pthread_t tid_sendto, tid_recvfrom; // 线程标识ID, 非线程调度ID
sfd = socket(AF_INET, SOCK_DGRAM, 0);
signal(SIGINT, sig_int);
// 服务器套接字绑定地址
memset(&server_addr, 0, sizeof(sockaddr_in_t));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(PORT); // 服务器端口号
server_addr.sin_addr.s_addr = inet_addr(SeverIP);
if(-1 == bind(sfd, (sockaddr_t *)&server_addr, len)) {
perror("bind err");
goto err;
}
// 客户端地址
memset(&client_addr, 0, sizeof(sockaddr_in_t));
client_addr.sin_family = AF_INET;
client_addr.sin_port = htons(PORT + 1); // 服务器端口号
client_addr.sin_addr.s_addr = inet_addr(ClientIP);
/* 子线程1发送 */
/* 子线程2接收 */
if(pthread_create(&tid_sendto, NULL, work_sendto, NULL))
perror("pthread_create err");
if(pthread_create(&tid_recvfrom, NULL, work_recvfrom, NULL))
perror("pthread_create err");
pthread_join(tid_sendto, NULL);
pthread_join(tid_recvfrom, NULL);
return 0;
err:
close(sfd);
return -1;
}
client.c
#include
#include
#include
#include /* See NOTES */
#include
#include
#include
#include
#include
#include
typedef struct sockaddr sockaddr_t;
typedef struct sockaddr_in sockaddr_in_t;
typedef struct in6_addr in6_addr_t;
typedef unsigned int u32;
#define CUR printf("%s : %d\n", __FILE__, __LINE__);
#define SeverIP "192.168.1.104"
#define THRAN_1024 1025
#define PORT THRAN_1024
static int cfd, ret, len = sizeof(sockaddr_t);
static sockaddr_in_t server_addr; // 服务器地址
/* ctr +c 关闭描述符*/
static void sig_int(int sig)
{ close(cfd);
exit(0);
}
void *work_sendto(void *arg)
{
char buf[50];
while (1) {
memset(buf, 0, 50);
fgets(buf, 50, stdin); // 获取输入
sendto(cfd, buf, strlen(buf), 0, (sockaddr_t *)&server_addr, len);
}
pthread_exit(NULL);
}
void *work_recvfrom(void *arg)
{
char buf[50];
int ret;
while (1) {
memset(buf, 0, 50);
ret = recvfrom(cfd, buf, sizeof(buf), 0, (sockaddr_t *)&server_addr, &len); // 阻塞接口
printf("recvfrom %d: %s", ret, buf);
if (!ret) {
perror("server shutdown");
exit(0);
}
}
pthread_exit(NULL);
}
int main(int argc, char **argv)
{
pthread_t tid_sendto, tid_recvfrom; // 线程标识ID, 非线程调度ID
cfd = socket(AF_INET, SOCK_DGRAM, 0);
signal(SIGINT, sig_int);
// 服务器套接字绑定地址
memset(&server_addr, 0, sizeof(sockaddr_in_t));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(PORT); // 服务器端口号
server_addr.sin_addr.s_addr = inet_addr(SeverIP);
/* 子线程1发送 */
/* 子线程2接收 */
if(pthread_create(&tid_sendto, NULL, work_sendto, NULL))
perror("pthread_create err");
if(pthread_create(&tid_recvfrom, NULL, work_recvfrom, NULL))
perror("pthread_create err");
pthread_join(tid_sendto, NULL);
pthread_join(tid_recvfrom, NULL);
return 0;
err:
close(cfd);
return -1;
}